988109: Updated the code snippet in the Menu Bar Component

[praveensf4999]

Updated the code snippet in the Menu Bar Component UG Sample
Output:

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 988109-hotfix

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 988109-hotfix
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
Front matter Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0